M100 (Gary Imm) - AstroBin

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: M 100 · NGC 4321 · NGC 4322 · NGC 4323 · NGC 4328

M100

This Messier Object, also known as NGC 4321, is a grand design spiral galaxy located 50 million light years away in the constellation of Coma Berenices at a declination of +16 degrees. It is a magnitude 9.4 galaxy which spans 8 arc-minutes in our apparent view. This corresponds to a Milky Way size diameter of 120,000 light years. It is the 47th brightest galaxy in the sky.

Although it appears to be face-on to us and is often called that, the galaxy disk inclination angle is about 30 degrees from face-on.

This is a beautiful galaxy with distinct spiral arms, blue star clouds, pink HII regions, and dark dust lanes. The spiral arms extend out 360 degrees from the core. The highlight of this galaxy for me is the bright colorful star forming nuclear ring immediately surrounding the core.

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Description: Comparison to Hubble Image

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ZWO ASI294MM Pro Images
CMOS Imagers
Cloudy Nights
Schmidt-Cassegrain Telescope (SCT) Imagers
Texas Astronomy
Images from the EdgeHD Series

Brightest Galaxy Catalog (Complete)
Galaxy - Pseudorings
Messier Catalog (Complete)

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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Star trails
Northern lights
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Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5740268
PixInsight job	KCQQ18Q8RK25CO9JVY0EFPTEP85RGVC0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h22m55s.810
RA (top/left)	12h23m40s.446
RA (top/right)	12h22m08s.662
RA (bottom/right)	12h22m09s.771
RA (bottom/left)	12h23m41s.442

Dec (center)	+15°49′20″.68
Dec (top/left)	+15°57′16″.14
Dec (top/right)	+15°56′55″.90
Dec (bottom/right)	+15°41′23″.88
Dec (bottom/left)	+15°41′45″.28

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M100

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M100

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